Lubricating.



' eating.

, Patented November 17, 1903.

PATENT OFFICE.

WILHELM MICHALK, on DEUBEN, GERMANY.

LUBRICATING.

SPECIFICATION forming part of Letters Patent No. 744,088, dated November17, 1903.

Application filed July 22, 1901. Serial No. 69,241; (No model.)

- To all whom it may concern:

Be it known that I, WILHELM MIOHALK, a subject of the King of Saxony,residing at Deuben, near Dresden,in-the Kingdom of Saxony, Empire ofGermany, have invented a certain new and useful Improvement inLubricating, of which the following is a full, clear, and exactdescription.

The present invention relates to a lubricatingarrangement for theworking faces of slide valves and the like which is mainly characterizedby the lubricating materialin the said arrangement being directlyconveyed through channels of the slide-valve continually open to theoutside or side faces of the latter and from there tothe'alternately-exposed parts of the slide-surfaces of the valvebox orthe like, onto which it is conveyed in the form of threads. By thisarrangement the result is attained that the lubricant is conveyed withcertainty and thoroughness between the slide-surfaces of the slide-valveand the valve-box, and thus a thorough and efiective lubrication of theslide-surfaces is obtained with a most economical consumption oflubricant, and thus the wearing or eating away of the surfaces isprevented. v It has been proposed to convey the lubricant either to theoutside of the slide-valve by tubular pistons connected with oil-cupsand fitted into pump-cylinders formed in or on the back or side of theslide-valve, said pistons and pump-cylinders being provided with valves,or through oil grooves or channels of the slide-valve directly betweenthe opposite bearingsurfaces of the slide-valve and the valve-box; butin these cases the vapor penetrates the pump-cylinders, respec tively,between the opposite bearing-surfaces of the slide-valve and thevalve-box and in the oil-channels of the valve and forms condensed waterin the same, which if the channels are not open to the outside cannotescape, but by the pressure thereby arising in the closed channels boilsand decomposes the oil, and thereby'makes it ineffective for lubri-Moreover, in the case of vertical slide-valvesused hitherto thelubricant has place incompletely, while much lubricant was consumeduselessly without being able to reach the surface to be lubricated. Avery better lubricating efiect results if the oil is only conveyed bychannels of the slide-valve directly onto the outside or side faces ofthe slide-valve and from there to the alternatelyexposed parts of theslide-surfaces of the valve-box or the like; and the feature of thepresent invention is that the oil-channels of the valve are continuallyopen to the side faces of the latter to prevent any pressure of vaporand condensed water in the interior of the channels. V

In the accompanying drawings, Figure 1 is a cross-section of a valve-boxlying inclined or obliquely and having the slide-valve provided withthis improved arrangement. Fig. 2 is alongitudinal section of the same.3 and 4 show a similar but somewhat modified form of construction tothat one shown in Figs. 1 and 2. Figs. 5 and 6 are also a similar formof construction of the arrangement in a vertical slidewalve. Fig. 7shows a similar form of construction of the arrangement, in which theouter openings of the slidesvalve channels lie inside the slide-frame.In the arrangement shown in Figs. 1 and 2 a trough-shaped recess (2 isformed in the slide a, which receives the lubricant applied from theoutside through a pipe f and from which passages or channels I) lead andopen continually toward the outside or side faces of the slide, on whichthe lubricant runs downward in the form of threads to the alternately-exposed parts of the slide-surface m. As the channels I) arecontinually open to the outside of the slidevalve, the vapor isprevented to penetrate in the channels I) under pressure and to formcondensed, respectively,

Figs.

boiled water therein, so that the lubricant becomes not decomposed, butremains highly reflective for lubricating.

In slide-valves or slides having a short travel in order to enable thelubricant to also reach with certainty the center of the slidetrack inthe arrangement shown in Figs. 3 and 4 the passages or channels barebrought near the center down "to the sole or slide-surface of the valve,and grooves or channels 0 are formed in the slide-surface of the saidvalve. The said channels 0' join to the lower end of the channels I) andlead also to the outside of the slide-valve. By these means, as isevident, the lubricant is conveyed near the center of the valve-boxslide-surface m and yet by means of the passages c is also enabled toreach the outside or side faces of the slide-valve. The passages 0 alsoserve to conduct the water condensed from the steam which comes betweenthe slide-valve and the slide-surface m of the slide-box to the outsideof the valve, so that the lubricant is not decomposed by the condensedwater.

Figs. 5 and 6 show a form of construction of the arrangement similar tothat one shown in Figs. 1 and 2, but applied on a vertical slide-valve.d is the trough-shaped recess of the slide. a and b are the channelsleading toward the outside or side faces of the latter and close to theslide-surface m of the valvebox. From these figures it may also be seenthat at the sides-of the slide-valve inclined grooves g are formed whichfall toward the slide-surface of the valve. Any oil running out of theslide-valve, which would otherwise be uselessly lost, is caught by thesefurther channels g and retained and conducted downward to, theslide-surface m in order there to fulfil its purpose of lubricating theopposite bearing-surfaces of the slide-valve and the valve-box.

The arrangement shown in Fig. 7 is also similar to that one shown inFigs. 1 and 2; but the outer openings of the channels b still lie insidethe slide-frame h, which cannot be avoided in many forms of slideconstruction. In order that the oil from the ohannelsb may not run alongthe slide-frame h and be carried away from this latter by the steamwithout acting on the slide-valve surface, recesses 7c are provided onthe inner side of the slide-frame h opposite the openings of thechannels I), which recesses prevent the escaping oil from coming incontact with the slide-frame, and, on the other hand, compel it to onlyrun downward on the slide and to thus reach with certainty thealternatelyexposed parts of the slide-surface m. T 0 enable the oil tomore easily flow out from the channels 5, further grooves or the like'5, joining to the outer openings of the said channels and leadingdownward, may be arranged on the side faces of the slide-valve.

Having now described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In a lubricating arrangement for valveslide surfaces or the like thecombination with a-valve-seat, of a slide-valve at, having a recess dand channels 1) leading from the said recess through the slide-valve andbeing continually open to the side faces of the same which channelsconvey the lubricant entering the recess 61 and the condensed water ontothe side faces of the latter on which the lubricant runs downward to thealternately-exposed surfaces of the valve-box, said recess d beingarranged in the upper side of the slide and the said channel 6 extendingdownwardly therefrom, substantially as described and for the purposestated.

2. In a lubricating arrangement for valveslide surfaces or the like thecombination with a valve-seat, of a slide-valve 0. having a recess d andchannels 1) leading from the said recess more to the center of theslide-surface of the valve and continuing from there intooutwardly-leading channels 0 formed in the slide-surface of the valve,which channels convey the lubricant and also the condensed water to theside faces of the slide-valve, substantially as described and for thepurpose stated.

3. In a lubricating arrangement for valveslide surfaces or the like thecombination with a valve-seat, of a slide-valve at having a recess d andchannels leading from the said recess through the slide-valve and beingcontinually open to the side faces of the same, and inclined grooves gor the like arranged on the side faces of the slide-valve and fallingtoward the slide-surface of the valve which grooves catch the lubricantrunning down the sides of the slide-valve and convey it to theslide-surface, substantially as described.

4. In a lubricating arrangement for slidesurfaces or the like thecombination with a valve-seat, of a slide-valve ahaving a recess (1 andchannels leading from the said recess through the slide-valve and whichopen inside the valve-frame it onto the side faces of the valve or intogrooves '11 provided in the latter, recesses is being provided oppositethe mouth of these passages on the inner side of the slide-valve framein order to prevent the escaping lubricant from coming in contact withthe slide-valve frame and carried away by the same, instead of reachingthe slidesurfaces, substantially as described.

In witness whereof I have hereunto set my hand in presence of twowitnesses.

- WVILHELM MICHALK.

Witnesses:

MARGARETE SoHIoK, I'IERNANDO DE SOTO.

